It was your older sister, Emily, barely older than you at 20, you being 18.
"Wake up! Sleepy head..." She sighs.
"I'm up, I'm up." You say, chucking a pillow at her. She catches it without effort.
"Nice try. C'mon! Get up and measure me!" She throws the pillow back onto the bed. You chuckle and roll your eyes. Emily is short, emphasis on short. At only 4'10", she was smaller than anyone you've known. After hoping for a growth spurt that never came, she eventually read online that people could have late growth spurts, and has now been hoping to have one ever since.
"I already measured you last week, what difference will this week make?" You ask, finally getting out of bed. Emily sticks her tongue out at you.
"Even so, it's not going to kill you to measure me. Now hurry up!" She said, jolting out of your room. You follow, rolling your eyes seeing her already up against the wall you have measured her at before. Sighing, you relent and grab a pencil.
"Don't stand on your tip toes. Don't want to make you too tall." You say, getting ready to make the mark.
"Oh ha ha, just hurry up." She retorts. Just as you were about to mark her height, which had of course nothing changed, your hand, for whatever reason, shoots up and marks about 3 inches above her head.
"Crud, sorry Emily, I accidentally..." You are cut off by Emily suddenly growing those three inches to reach the mark. You blink, looking down to see Emily's feet still planted flat on the ground.
"Well? Anything?" Emily asked, seemingly totally unaware that she just miraculously grew right before your eyes.
"Um, well-" Not waiting for your response, she turns around to see for herself.
"Yes! I grew! In your face mister 'people at your age don't grow anymore'!" She teased, ecstatic that she's now 5'1", meanwhile you're still trying to process what just happened. Now you just need to decide what to do now.